PT - Portugal

Portugal is divided into 18 Districts, called "Distritos" in portuguese language, plus 4 other entities in the Autonomous Regions of Azores and Madeira for a total of 22 Entities.

To detect the County you can use Wikipedia.

REFERENCE	DESCRIPTION	PFX	DXCC	EURA CODE
EUCC-PT-AE	Aut. Region of Azores Islands, East Group (EU-003)	CU1-2	149	EURA-111
EUCC-PT-AC	Aut. Region of Azores Islands, Central Group (EU-175)	CU3-4-5-6-7	149	EURA-111
EUCC-PT-AW	Aut. Region of Azores Islands, West Group (EU-089)	CU8-9	149	EURA-111
EUCC-PT-AV	Disctrict of Aveiro	CT	272	EURA-106
EUCC-PT-BG	Disctrict of Bragança	CT	272	EURA-105
EUCC-PT-BJ	Disctrict of Beja	CT	272	EURA-108
EUCC-PT-BR	Disctrict of Braga	CT	272	EURA-105
EUCC-PT-CB	Disctrict of Castelo Branco	CT	272	EURA-106
EUCC-PT-CO	Disctrict of Coimbra	CT	272	EURA-106
EUCC-PT-EV	Disctrict of Evora	CT	272	EURA-108
EUCC-PT-FR	Disctrict of Faro	CT	272	EURA-109
EUCC-PT-GD	Disctrict of Guarda	CT	272	EURA-106
EUCC-PT-LE	Disctrict of Leiria	CT	272	EURA-107
EUCC-PT-LX	Disctrict of Lisboa	CT	272	EURA-107
EUCC-PT-MD	Autonomous Region of Madeira	CT3	256	EURA-110
EUCC-PT-PG	Disctrict of Portalegre	CT	272	EURA-108
EUCC-PT-PT	Disctrict of Porto	CT	272	EURA-105
EUCC-PT-SR	Disctrict of Santarem	CT	272	EURA-107
EUCC-PT-ST	Disctrict of Setubal	CT	272	EURA-108
EUCC-PT-VC	Disctrict of Viana do Castelo	CT	272	EURA-105
EUCC-PT-VR	Disctrict of Vila Real	CT	272	EURA-105
EUCC-PT-VS	Disctrict of Viseu	CT	272	EURA-106

This eQSL shows the QTH: Barreiro.

Put this info into the search engine of Wikipedia and you will find this:

The District is Setubal, code PT-ST